PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 165

• Manufacturer Part Number: PIC16F946T-I/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

13.1.4
To read a program memory location, the user must
write two bytes of the address to the EEADRL and
EEADRH registers, set the EEPGD control bit
(EECON1<7>),
(EECON1<0>). Once the read control bit is set, the
program memory Flash controller will use the second
instruction cycle to read the data. This causes the
second instruction immediately following the
“BSF EECON1,RD” instruction to be ignored. The data
is available in the very next cycle, in the EEDATL and
EEDATH registers; therefore, it can be read as two
bytes in the following instructions. EEDATL and
EEDATH registers will hold this value until another read
or until it is written to by the user (during a write
operation).
EXAMPLE 13-3:
© 2005 Microchip Technology Inc.
Note 1: The two instructions following a program
;
;
2: If the WR bit is set when EEPGD = 1, it
READING THE FLASH PROGRAM
MEMORY
BSF
BCF
MOVLW
MOVWF
MOVLW
MOVWF
BSF
BSF
BSF
NOP
NOP
BCF
MOVF
MOVWF
MOVF
MOVWF
memory read are required to be NOP’s.
This prevents the user from executing a
two-cycle
instruction after the RD bit is set.
will be immediately reset to ‘0’ and no
operation will take place.
and
STATUS, RP1
STATUS, RP0
MS_PROG_EE_ADDR;
EEADRH
LS_PROG_EE_ADDR;
EEADR
STATUS, RP0
EECON1, EEPGD
EECON1, RD
STATUS, RP0
EEDATA, W
DATAL
EEDATH, W
DATAH
FLASH PROGRAM READ
then
instruction
set
control
on
;
; Bank 2
; MS Byte of Program Address to read
; LS Byte of Program Address to read
; Bank 3
; Point to PROGRAM memory
; EE Read
; Any instructions here are ignored as program
; memory is read in second cycle after BSF EECON1,RD
; Bank 2
; W = LS Byte of Program EEDATA
;
; W = MS Byte of Program EEDATA
;
the
bit
next
Preliminary
RD
PIC16F946
DS41265A-page 163